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Finding the Fourth Proportional to 257,307.95, 355,103.67 and 155,358.21

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Solution

The fourth proportional to 257,307.95, 355,103.67 and 155,358.21 is: 214,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,307.95 : 355,103.67 = 155,358.21 : x
  2. Step 2: Convert to fraction form
    257,307.95/355,103.67 = 155,358.21/x
  3. Step 3: Cross multiply
    257,307.95x = 355,103.67 × 155,358.21
  4. Step 4: Simplify right side
    257,307.95x = 55,168,270,535.63
  5. Step 5: Solve for x
    x = 55,168,270,535.63/257,307.95
  6. Step 6: Final answer
    x = 214,405.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.